Shih Tzus were developed in China's imperial court from small Tibetan dogs and were kept purely as companions, which still shows. A typical Shih Tzu weighs 9 to 16 pounds, with a short square muzzle, big dark eyes and a long double coat. Most are friendly with visitors and other pets, and they'd rather follow you from room to room than patrol a yard.
In Fort Lauderdale, the care that matters most is the coat and the face. Humidity and canal-side walks leave a long coat tangled and dirty, so daily brushing or a short trim every few weeks keeps it manageable. The flat face makes breathing harder in heat, so a Shih Tzu belongs indoors in air conditioning for most of the day. Dogs vary, and each Shih Tzu's energy and personality depend on the dog, not just the breed.